MySQLDataTruncation:列的值超出范围

Question

我正在使用ibatis和一个java webapp插入一行。POJO有一个字段需要存储一个数字(如3.0或2.34)。我尝试过在Java端使用BigDecimal和Double。在MySQL方面，我使用的是Decimal(5，5)数据类型。

当我尝试插入一个数值字段的值为"4“的行时，MySQL和iBatis抛出了以下异常：

org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation: encountered SQLException [  
--- The error occurred in org/mySQL.xml.  
--- The error occurred while applying a result map.  
--- Check the mySQL.insertQuery.  
--- The error happened while setting a property on the result object.  
--- Cause: java.lang.RuntimeException: org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation: encountered SQLException [  
--- The error occurred while applying a parameter map.  
--- Check the insertQuery-InlineParameterMap.  
--- Check the statement (update failed).  
--- Cause: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value for column 'numericColumn' at row 316]; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   
    at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:188)
    at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithRowHandler(GeneralStatement.java:133)
    at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryWithRowHandler(SqlMapExecutorDelegate.java:649)
    at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryWithRowHandler(SqlMapSessionImpl.java:156)
    at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryWithRowHandler(SqlMapClientImpl.java:133)
    at org.springframework.orm.ibatis.SqlMapClientTemplate$5.doInSqlMapClient(SqlMapClientTemplate.java:267)
    at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:165)
    at org.springframework.orm.ibatis.SqlMapClientTemplate.queryWithRowHandler(SqlMapClientTemplate.java:265)
    at org.myClass(myClass.java:83)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:324)
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:248)
    at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:165)
    at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:66)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)

对于要插入的值，我是否使用了错误的java数据类型？如果不是，为什么MySQL不让我插入值呢？

Answer 1

您似乎误解了在SQL中定义DECIMAL (或潜在的NUMERIC)列的工作方式。

具体地说，当将列定义为DECIMAL(x, y)时，x是列将存储的位数，y是小数点后的位数。因此，在列定义中，您指定了-1 < column < 1的范围。数据类型是正确的，但是您试图指定的值超出了列允许的范围。幸运的是，修复方法很简单:更改列定义。我假设您希望小数点前有5位数字，这将使列定义为DECIMAL(10, 5)。